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[RumataEstor]

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Сообщение от IvanOFF

На сервере _CryptAcquireContext.call(prov, 0, 0, #PROV_RSA_FULL, 0) возвращает false, на моем WinXP - true.

BOOL WINAPI CryptAcquireContext(
  __out         HCRYPTPROV* phProv,
  __in          LPCTSTR pszContainer,
  __in          LPCTSTR pszProvider,
  __in          DWORD dwProvType,
  __in          DWORD dwFlags
);

When pszContainer is NULL, a default key container name is used. For example, the Microsoft Base Cryptographic Provider uses the logon name of the currently logged on user as the key container name. Other CSPs can also have default key containers that can be acquired in this way.

Может, на сервере currently logged on user неопределен?